Alert archive / Montana / Flash Flood Warnings in 1990
Flash Flood Warning 1, NWS Great Falls, MT
NWS Great Falls, MT issued this flash flood warning at May 24, 1990, 10:01 PM MDT for Hill County, Montana. It was in force for 119 min.
The area
The counties it named.
The facts
- Issued
- May 24, 1990, 10:01 PM MDT (04:01 UTC)
- Expired
- May 25, 1990, 12:00 AM MDT
- In force
- 119 min
- Issued by
- NWS Great Falls, MT
- Area
- Whole counties
County Hill County, MT
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Glasgow Intl Airport, MT (KGGW), launched 00:00Z, 4.0 hours before the alert went out and 263 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 319 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1980 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KHVR 250404
FFWHVR
MTC041-250600-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HAVRE MT
1001 PM MDT THU MAY 24 1990
THE NATIONAL WEATHER SERVICE IN HAVRE MT HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL MIDNIGHT MDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN NORTH CENTRAL MONTANA
...NORTHWESTERN HILL
THUNDERSTORMS WITH VERY HEAVY SHOWERS CONTINUE TO MOVE INTO THE
NORTHWEST QUARTER OF HILL COUNTY. THIS AREA...NORTH OF
HINGHAM...RUDYARD AND GILDFORD...HAD WASHED OUT ROADS AND STANDING
WATER FROM UP TO 3 TO 4 INCHES OF RAIN THIS AFTERNOON...WITH 11/2 TO
21/2 INCHES MOST COMMON THIS AFTERNOON INTO THIS EVENING.
PERSONS IN NORTHWEST HILL COUNTY CAN EXPECT CONTINUED HEAVY SHOWERS
THROUGH THE NIGHT...PRODUCING EVEN MORE FLOODING...AND SHOULD BEWARE
ESPECIALLY OF CREEKS AND LOW SPOTS.
MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR L<OW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A
SMALL ONE...ON FOOT.What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, May 24, 4:33 PM MDT, 5 hours 28 minutes before
MTZ003-006-250000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 430 PM MDT THU MAY 24 1990 AT 430 PM MDT RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL AND HAIL OVER THE LITTLE BELT MOUNTAINS SOUTHEAST OF GREAT FALLS EXTENDING SOUTHEAST TOWARD HARLOWTON. NO RAINFALL AMOUNTS HAVE BEEN RECEIVED BUT HEAVY RAIN WAS REPORTED AT NEIHART, ABOUT 50 MILES SOUTHEAST OF GREAT FALLS. THESE THUNDERSTORMS WERE MOVING TOWARD THE NORTHWEST AT ABOUT 20 MPH. HEAVY SHOWERS WILL LIKELY CONTINUE FOR A FEW MORE HOURS. RAPID RISES ARE LIKELY ALONG MANY OF THE SMALLER STREAMS IN AND AROUND THE LITTLE BELT MOUNTAINS THIS EVENING. SOME FLOODING OF THE SMALLER STREAMS IS LIKELY. THI/S ACTIVITY WILL LIKELY MOVE INTO THE GREAT FALLS AREA DURING THE NEXT COUPLE HOURS. DP
Special weather statement, May 24, 6:28 PM MDT, 3 hours 33 minutes before
MTC001-007-023-031-043-049-057-059-077-093-250030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HELENA MT 630 PM MDT THU MAY 24 1990 ...THUNDERSTORMS STILL MOVING ACROSS MONTANA... THE MAIN BAND OF THUNDERSTORMS CROSSING THE STATE HAS MOVED TO THE NORTH AND EAST OF THE HELENA AREA BUT RAINSHOWERS AND THUNDERSHOWERS ARE STILL OCCURRING THROUGHOUT WESTERN MONTANA. THE STRONGEST STORMS ARE PRESENTLY EAST OF A LINE FROM HAVRE TO BILLINGS WITH HEAVY RAINS...DANGEROUS LIGHTNING...STRONG GUSTY WINDS...SOME MINOR FLASHFLOODING...AND EVEN A FUNNEL CLOUD IN THE BILLINGS AREA. THESE STORMS WILL BE DECREASING IN STRENGTH THROUGH THE NIGHT...BUT CONTINUING AT REDUCED FREQUENCIES THROUGH FRIDAY. WYMORE
Special weather statement, May 24, 6:38 PM MDT, 3 hours 23 minutes before
MTZ005-242115- SPECIAL WEATHER STATEMENT...AND STORM REPORT NATIONAL WEATHER SERVICE HAVRE MT 630 PM MDT THU MAY 24 1990 ...TORNADO WATCH FOR HILL AND BLAINE COUNTIES UNTIL 9 PM MDT... WIDESPREAD STRONG THUNDERSTORMS HAVE BEEN OCCURRING SINCE MID- AFTERNOON IN NORTH-CENTRAL MONTANA. VERY HEAVY SHOWERS FELL WITH THESE STORMS IN WESTERN HILL COUNTY. THERE WERE REPORTS OF 1.5 TO NEARLY 4.0 INCHES OF RAIN IN A SMALL AREA...BETWEEN 15 AND 20 MILES NORTH OF HINGHAM AND GILDFORD. WIDESPREAD HIGH WATER AND RUNOFF WAS REPORTED...BUT NO DAMAGE REPORTED SO FAR. THIS STORM ALSO GAVE GENERALLY SMALL HAIL IN WESTERN HILL COUNTY...BUT THERE WAS A REPORT OF 3/4 INCH SIZE HAIL NEAR GILDFORD. THIS STORM HAS MOVED NORTH OUT OF THE AREA...BUT OTHERS CONTINUE TO FORM IN NORTH-CENTRAL MONTANA...EXTENDING MUCH FURTHER SOUTH INTO WYOMING. SOME OF THE STRONGEST STORMS WERE IN FERGUS COUNTY... MOVING NORTH AT 25 MPH TOWARD HILL...BLAINE...AND LIBERTY COUNTIES THIS EVENING. THERE HAVE BEEN TORNADOES AND FUNNEL CLOUDS IN SOUTH-CENTRAL MONTANA...BUT NONE REPORTED SO FAR IN NORTH-CENTRAL MONTANA. THUNDERSTORMS WILL CONTINUE TO MOVE INTO THE AREA FOR THE NEXT SEVERAL HOURS. TORNADOES...LARGE HAIL...DAMAGING WINDS...HEAVY SHOWERS...AND FREQUENT LIGHTNING STRIKES...ARE POSSIBLE UNIL 9 PM SIMONSEN
Special weather statement, May 24, 6:39 PM MDT, 3 hours 22 minutes before
MTZ005-250130- SPECIAL WEATHER STATEMENT...AND STORM REPORT NATIONAL WEATHER SERVICE HAVRE MT 630 PM MDT THU MAY 24 1990 ...TORNADO WATCH FOR HILL AND BLAINE COUNTIES UNTIL 9 PM MDT... WIDESPREAD STRONG THUNDERSTORMS HAVE BEEN OCCURRING SINCE MID- AFTERNOON IN NORTH-CENTRAL MONTANA. VERY HEAVY SHOWERS FELL WITH THESE STORMS IN WESTERN HILL COUNTY. THERE WERE REPORTS OF 1.5 TO NEARLY 4.0 INCHES OF RAIN IN A SMALL AREA...BETWEEN 15 AND 20 MILES NORTH OF HINGHAM AND GILDFORD. WIDESPREAD HIGH WATER AND RUNOFF WAS REPORTED...BUT NO DAMAGE REPORTED SO FAR. THIS STORM ALSO GAVE GENERALLY SMALL HAIL IN WESTERN HILL COUNTY...BUT THERE WAS A REPORT OF 3/4 INCH SIZE HAIL NEAR GILDFORD. THIS STORM HAS MOVED NORTH OUT OF THE AREA...BUT OTHERS CONTINUE TO FORM IN NORTH-CENTRAL MONTANA...EXTENDING MUCH FURTHER SOUTH INTO WYOMING. SOME OF THE STRONGEST STORMS WERE IN FERGUS COUNTY... MOVING NORTH AT 25 MPH TOWARD HILL...BLAINE...AND LIBERTY COUNTIES THIS EVENING. THERE HAVE BEEN TORNADOES AND FUNNEL CLOUDS IN SOUTH-CENTRAL MONTANA...BUT NONE REPORTED SO FAR IN NORTH-CENTRAL MONTANA. THUNDERSTORMS WILL CONTINUE TO MOVE INTO THE AREA FOR THE NEXT SEVERAL HOURS. TORNADOES...LARGE HAIL...DAMAGING WINDS...HEAVY SHOWERS...AND FREQUENT LIGHTNING STRIKES...ARE POSSIBLE UNIL 9 PM SIMONSEN
Special weather statement, May 24, 6:57 PM MDT, 3 hours 4 minutes before
MTZ003-005>009-250300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE GREAT FALLS MT 700 PM MDT THU MAY 24 1990 AT 630 PM MDT RADAR AND SATELLITE PICTURES INDICATED STRONGEST THUNDERSTORM ACTIVITY OVER SOUTH CENTRAL AND SOUTHEAST MONTANA WITH SEVERAL REPORTS OF FUNNEL CLOUDS, TORNADOES AND HAIL. BILLINGS RADAR INDICATED POSSIBLE SEVERE THUNDERSTORMS 60 MILES NORTH OF BILLINGS WITH ANOTHER JUST SOUTHWEST OF MILES CITY IN EXTREME EASTERN GARFIELD COUNTY. THUNDERSTORMS WERE MOVING NORTH AT ABOUT 20 MPH. HEAVY THUNDERSHOWERS CONTINUED ACROSS MUCH OF CENTRAL MONTANA WITH WATER REPORTEDLY RISING RAPIDLY ALONG BELT CREEK IN THE LITTLE BELT MOUNTAINS. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE AREA AROUND THE LITTLE BELT MOUNTAINS UNTIL 1AM MDT FRIDAY MORNING. A FLASH FLOOD WATCH HAS ALSO BEEN ISSUED FOR NORTH CENTRAL MONTANA VALID UNTIL 2AM MDT. HEAVY RAINS UP TO 3 TO 4 INCHES HAVE ALREADY FALLEN NORTHWEST OF HAVRE IN HILL COUNTY. ANOTHER AREA OF THUNDERSTORMS WITH HEAVY RAIN IS HEADED TOWARD THE AREA. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF CENTRAL MONTANA UNTIL 9PM MDT THIS EVENING AND FOR THE EASTERN THIRD OF MONTANA UNTIL 2AM MDT. PERSONS ALONG THE STREAMS AND RIVERS OF CENTRAL AND NORTH CENTRAL MONTANA SHOULD BE ON THE WATCH FOR RAPIDLY RISING WATERS THE REMAINDER OF TONIGHT. PATERSON
Nearby
Flash Flood Warnings in Montana, 1990Every flash flood warning in 1990
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.